Web sites that accept contributions from the public, like this wiki, are often abused by spammers who use automated tools to add their links to many sites. While these spam links can be removed, they are a significant nuisance.
This is why the wiki will ask you to answer a question. Since this is a task that is hard to automate, it will allow most real humans to make their contributions while stopping most spammers and other robotic attackers.
Registered users do not need to enter catcha ! Create your account now !
Please contact the site administrators for assistance if this is unexpectedly preventing you from making legitimate contributions.
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